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  2. Quantities of information - Wikipedia

    en.wikipedia.org/wiki/Quantities_of_information

    Quantities of information. A misleading [ 1] information diagram showing additive and subtractive relationships among Shannon 's basic quantities of information for correlated variables and . The area contained by both circles is the joint entropy . The circle on the left (red and violet) is the individual entropy , with the red being the ...

  3. Rao–Blackwell theorem - Wikipedia

    en.wikipedia.org/wiki/Rao–Blackwell_theorem

    An estimator δ(X) is an observable random variable (i.e. a statistic) used for estimating some unobservable quantity. For example, one may be unable to observe the average height of all male students at the University of X, but one may observe the heights of a random sample of 40 of them. The average height of those 40—the "sample average ...

  4. Information theory - Wikipedia

    en.wikipedia.org/wiki/Information_theory

    Information theory is the mathematical study of the quantification, storage, and communication of information. The field was established and put on a firm footing by Claude Shannon in the 1940s, [ 1 ] though early contributions were made in the 1920s through the works of Harry Nyquist and Ralph Hartley.

  5. Packing problems - Wikipedia

    en.wikipedia.org/wiki/Packing_problems

    v. t. e. Packing problems are a class of optimization problems in mathematics that involve attempting to pack objects together into containers. The goal is to either pack a single container as densely as possible or pack all objects using as few containers as possible. Many of these problems can be related to real-life packaging, storage and ...

  6. List of unsolved problems in physics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Mu problem: A problem in supersymmetric theories, concerned with understanding the reasons for parameter values of the theory. Koide formula : An aspect of the problem of particle generations . The sum of the masses of the three charged leptons , divided by the square of the sum of the roots of these masses, to within one standard deviation of ...

  7. Fermi problem - Wikipedia

    en.wikipedia.org/wiki/Fermi_problem

    Fermi problem. In physics or engineering education, a Fermi problem (or Fermi quiz, Fermi question, Fermi estimate ), also known as a order-of-magnitude problem (or order-of-magnitude estimate, order estimation ), is an estimation problem designed to teach dimensional analysis or approximation of extreme scientific calculations.

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